The best Fiona Gallagher Shameless moments demonstrate why this Showtime dramedy will never be the same without Emmy Rossum. We're taking a look at Fiona's defining moments from the first nine seasons of Shameless. In case you’re not caught up, keep in mind there will be spoilers. MsMojo ranks the best Fiona Gallagher Shameless moments. Which Fiona Gallagher moment is your favorite? Let us know in the comments!